diff --git a/manifest.json b/manifest.json
index d4f0f39..08ede24 100644
--- a/manifest.json
+++ b/manifest.json
@@ -14,7 +14,7 @@
         "email": ""
     },
     "requirements": {
-        "yunohost": ">> 4.1.7"
+        "yunohost": ">> 4.2.4"
     },
     "multi_instance": true,
     "services": [
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 90f8f7b..48045d0 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -15,62 +15,62 @@ pkg_dependencies="ufraw-batch ffmpeg"
 # EXPERIMENTAL HELPERS
 #=================================================
 
-readonly YNH_DEFAULT_COMPOSER_VERSION=1.10.17
-# Declare the actual composer version to use.
-# A packager willing to use another version of composer can override the variable into its _common.sh.
-YNH_COMPOSER_VERSION=${YNH_COMPOSER_VERSION:-$YNH_DEFAULT_COMPOSER_VERSION}
+# readonly YNH_DEFAULT_COMPOSER_VERSION=1.10.17
+# # Declare the actual composer version to use.
+# # A packager willing to use another version of composer can override the variable into its _common.sh.
+# YNH_COMPOSER_VERSION=${YNH_COMPOSER_VERSION:-$YNH_DEFAULT_COMPOSER_VERSION}
 
-# Execute a command with Composer
-#
-# usage: ynh_composer_exec [--phpversion=phpversion] [--workdir=$final_path] --commands="commands"
-# | arg: -v, --phpversion - PHP version to use with composer
-# | arg: -w, --workdir - The directory from where the command will be executed. Default $final_path.
-# | arg: -c, --commands - Commands to execute.
-ynh_composer_exec () {
-    # Declare an array to define the options of this helper.
-    local legacy_args=vwc
-    declare -Ar args_array=( [v]=phpversion= [w]=workdir= [c]=commands= )
-    local phpversion
-    local workdir
-    local commands
-    # Manage arguments with getopts
-    ynh_handle_getopts_args "$@"
-    workdir="${workdir:-$final_path}"
-    phpversion="${phpversion:-$YNH_PHP_VERSION}"
+# # Execute a command with Composer
+# #
+# # usage: ynh_composer_exec [--phpversion=phpversion] [--workdir=$final_path] --commands="commands"
+# # | arg: -v, --phpversion - PHP version to use with composer
+# # | arg: -w, --workdir - The directory from where the command will be executed. Default $final_path.
+# # | arg: -c, --commands - Commands to execute.
+# ynh_composer_exec () {
+#     # Declare an array to define the options of this helper.
+#     local legacy_args=vwc
+#     declare -Ar args_array=( [v]=phpversion= [w]=workdir= [c]=commands= )
+#     local phpversion
+#     local workdir
+#     local commands
+#     # Manage arguments with getopts
+#     ynh_handle_getopts_args "$@"
+#     workdir="${workdir:-$final_path}"
+#     phpversion="${phpversion:-$YNH_PHP_VERSION}"
 
-    COMPOSER_HOME="$workdir/.composer" \
-        php${phpversion} "$workdir/composer.phar" $commands \
-        -d "$workdir" --quiet --no-interaction
-}
+#     COMPOSER_HOME="$workdir/.composer" \
+#         php${phpversion} "$workdir/composer.phar" $commands \
+#         -d "$workdir" --quiet --no-interaction
+# }
 
-# Install and initialize Composer in the given directory
-#
-# usage: ynh_install_composer [--phpversion=phpversion] [--workdir=$final_path] [--install_args="--optimize-autoloader"] [--composerversion=composerversion]
-# | arg: -v, --phpversion - PHP version to use with composer
-# | arg: -w, --workdir - The directory from where the command will be executed. Default $final_path.
-# | arg: -a, --install_args - Additional arguments provided to the composer install. Argument --no-dev already include
-# | arg: -c, --composerversion - Composer version to install
-ynh_install_composer () {
-    # Declare an array to define the options of this helper.
-    local legacy_args=vwa
-    declare -Ar args_array=( [v]=phpversion= [w]=workdir= [a]=install_args= [c]=composerversion=)
-    local phpversion
-    local workdir
-    local install_args
-    local composerversion
-    # Manage arguments with getopts
-    ynh_handle_getopts_args "$@"
-    workdir="${workdir:-$final_path}"
-    phpversion="${phpversion:-$YNH_PHP_VERSION}"
-    install_args="${install_args:-}"
-    composerversion="${composerversion:-$YNH_COMPOSER_VERSION}"
+# # Install and initialize Composer in the given directory
+# #
+# # usage: ynh_install_composer [--phpversion=phpversion] [--workdir=$final_path] [--install_args="--optimize-autoloader"] [--composerversion=composerversion]
+# # | arg: -v, --phpversion - PHP version to use with composer
+# # | arg: -w, --workdir - The directory from where the command will be executed. Default $final_path.
+# # | arg: -a, --install_args - Additional arguments provided to the composer install. Argument --no-dev already include
+# # | arg: -c, --composerversion - Composer version to install
+# ynh_install_composer () {
+#     # Declare an array to define the options of this helper.
+#     local legacy_args=vwa
+#     declare -Ar args_array=( [v]=phpversion= [w]=workdir= [a]=install_args= [c]=composerversion=)
+#     local phpversion
+#     local workdir
+#     local install_args
+#     local composerversion
+#     # Manage arguments with getopts
+#     ynh_handle_getopts_args "$@"
+#     workdir="${workdir:-$final_path}"
+#     phpversion="${phpversion:-$YNH_PHP_VERSION}"
+#     install_args="${install_args:-}"
+#     composerversion="${composerversion:-$YNH_COMPOSER_VERSION}"
 
-    curl -sS https://getcomposer.org/installer 2>&1 \
-        | COMPOSER_HOME="$workdir/.composer" \
-        php${phpversion} -- --quiet --install-dir="$workdir" --version=$composerversion \
-        || ynh_die "Unable to install Composer." 2>&1
+#     curl -sS https://getcomposer.org/installer 2>&1 \
+#         | COMPOSER_HOME="$workdir/.composer" \
+#         php${phpversion} -- --quiet --install-dir="$workdir" --version=$composerversion \
+#         || ynh_die "Unable to install Composer." 2>&1
 
-    # update dependencies to create composer.lock
-    ynh_composer_exec --phpversion="${phpversion}" --workdir="$workdir" --commands="install --no-dev $install_args" \
-        || ynh_die "Unable to update core dependencies with Composer."
-}
+#     # update dependencies to create composer.lock
+#     ynh_composer_exec --phpversion="${phpversion}" --workdir="$workdir" --commands="install --no-dev $install_args" \
+#         || ynh_die "Unable to update core dependencies with Composer."
+# }